Interstage Shunsaku Data Manager Operator's Guide - Microsoft(R) Windows(R) 2000/ Microsoft(R) Windows Server(TM) 2003 - - UNIX -

5.5.3 Recovery

If data is lost during operation, the lost data can be recovered by returning the director data to the state that existed prior to the loss.

The following example shows the recovery procedure used when data has been lost by running an application accidentally.

[Figure : Performing Recovery when Data Loss Occurs]

The following procedure is used to recover the director data files to a specified point in time.

Before recovering director data files, stop all applications to prevent data searches and updates from occurring.

[Figure : Procedure for Recovery to a Specified Point in Time]

1. Execute the shundrecover command with the -b option to declare the start of the recovery process.

   shundrecover -s director identifier -b

2. Use an operating system command or a disk device copy function to restore the backup data of the director data files.

   

   copy command, etc.

   

   cp command, etc.

3. Execute the shundrecover command with the -e option and the -p option followed by a date and time immediately prior to the time that the data loss occurred to declare the end of the recovery process.

   The recovery end declaration will use the operation log files to restore the director data files to the specified date and time.

   shundrecover -s director identifier -e -p 2005-01-01:12:00:00

• The shundrecover command recovers only the backup data of the director data file that was backed up using the shundbackup command.
• The shundrecover command will generate an error if it is executed with the -p option specifying a date and time prior to the latest backup. Always specify a date and time after the latest backup.
• If director data has not been backed up, the lost data cannot be recovered. If this is the case, recreate the lost data or use the following procedure to register lookup data again.
  • Stop Shunsaku.
  • Remove the director data file using the operating systems deletion command.
  • Restart Shunsaku.
  • Register the lookup data.

  Refer to 3.2 Starting and Stopping Shunsaku for more information on how to start and stop Shunsaku.
  Refer to 3.3 Registering Lookup Data for more information on how to register lookup data.